Piston-packing for gas-engines.



A. GIRTANNER.

PISTON PACKING FOP- GAS ENGINES.

APPLICATION nun YEB.12.1912.

1,1 1 1,062, Patented Sept 22,1914.

, pointed out in the To all whom itmay concern:

certain new and UNITED STATES ALEXANDER GIRTANNER, OF S'Ii LOUIS,'E'IISSO'URI, ASSIGNOR- OF ST. L'GUIS, MISSOURI.

F'OSEPE E. BEEBEE,

IISTDN-PACKING Be it known that l, Anrnmnn Gin'rAN- NEE, a citizen ofthe United Stateaand resident of Sit-Louis, Missouri, have inventeduseful Improvements in Piston-Packing for Gas-Engines, of which thefollowing is a specification containing a full, clear, and exactdescription, reference being had to the accompanying drawings, formingapart hereof.

My invention relates to an improved piston packing for gas engines, andconsists in the novel construction herein described and claim.

e object of my invention is to provide a very simple, cheap andeificient piston packing for gas and gasolene engines, which shall beadapted to fit the cylinder tightly with as little friction as possible,even should the surface or" the, cylinder be uneven, as is usually the,case with old cylinders which have long been in'service.

A further object of my invention is to p1'0 vide an improved pistonpacking for gas and gasolene engines in which the resilient packingrings shall be assisted in expanding by the pressure of the gas, so thatsaid rings will fit thecylinder closely duringoperation.

In the drawings Figure 1 is a plan view of a pair of my improvedresilient packing rings; Fig. 2 is a sectional elevation of the innerring, the section being taken on the line 22 of Fig. 1 looking in thedirection indicated by the arrow; Fig. 3 is a similar sectionalelevation of the outer ring; and Fig. l is a sectional elevation of agas or gasolene engine cylinder and piston having my invention appliedthereto.

The piston l is provided with the usual rectangular peripheral grooves 2within each of which is mounted mating pair of normally resilientpacking rings 8 and 4 respectively. The said rings 3 and 4 are V-shapedin cross section so that they act as wedges in abutting against eachother and thereby expand the ring 3 whenever the pressure of gas isapplied to the outer exposed Specification of-Lettcrs IPatent.

' sides of the rings, thus PATENT orrrcn FDR GAS-ENGINES.

12, 3.912. Serial No. 876,925.

reducing a tight fit between the outer perip cry of said rings 3 and thewall of the cylinder without the use of extraneous springs or otherdevices, The rings 3 and 4 are turned up of a diameter greater than thatof the cylinder bore, and then a piece is cut out of them, and theirends are overlapped at 5 for the purpose of breaking joints Theseoverlap ed ends 5 are preferably cut at angles oti er than right anglesrelative to the axis of the ring, and in placing the two rings inposition care should be taken to separate the cuts in the two rings.

In Fig. 1 the rings are shown in dotted lines previous to theircontraction, and it will thus be readily understood that when the ringsare inserted in the grooves 2 and the piston placed in the cylinder, therings will then possess the desired resiliency which, when assisted bythe pressure of the gas, in a manner ates, to expand the rings 3 andform a tight joint with the "core of the cylinder, even if the latter beconsiderably worn and uneven.

I claim:

As a new article of manufacture, a pack ing constructed of twoconcentric rings whose combined cross section is substantiallyrectangular, and whose meeting faces are 1 disposed at oblique angles,each of said rings having separated ends and said separated ends beingpositioned out of registration with each other, each of said rings beingconstructed of elastic material so that the inner ring will at all timesbe yieldingly held to the outer ring and the outer rin be held againstthe inner wall of the cylinder; in which the packing is used.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing witnesses.

ALEXANDER GIRTANNER.

?atented Sept. 22, 1914;

